code: def output_size(self) -> int:
      return 1
  
file_path: espnet/espnet2/tts/feats_extract/ying.py
imports: import math
  from typing import Any, Dict, Tuple, Union
  import torch
  from espnet2.tts.feats_extract.abs_feats_extract import AbsFeatsExtract
  from espnet2.tts.feats_extract.yin import *
  from espnet.nets.pytorch_backend.nets_utils import pad_list
label_desc: Use image node_id 2 for calling the Ying obj's underlying member method code with example usage: obj.output_size() and returns: int